Spice can be bought or thieved from the Spice stall in the Ardougne market (requires level 65 Thieving) or looted from a Gourmet impling or Baby impling. It can also be bought for 299 coins from the Culinaromancer's Chest at the Lumbridge kitchen basement, however it can only be accessed if you have completed the beginning part of Recipe for Disaster. Though it comes in a shaker, it is a one-use item. Not to be confused with Gnome spice.
You need spice in the goblin sub-quest of Recipe for Disaster, as well as for the Desert Treasure quest.
Monster Combat level Quantity Rarity Gourmet impling N/A 1 Baby impling N/A 1 Mummy 84; 125 10